The wide-ranging discussion touched on issues from Internet freedom to space travel to the most difficult decision of his presidency (which Obama said was sending more troops to Afghanistan).

Obama also weighed in on a question about the "corrupting influence of money in politics," and said this about the 2010 Supreme Court decision that has helped open the political arena to more money: "I think we need to seriously consider mobilizing a constitutional amendment process to overturn Citizens United (assuming the Supreme Court doesn't revisit it)."

And asked to disclose the recipe for the White House's Honey Ale home brewed beer, he promised: "It will be out soon! I can tell from first hand experience, it is tasty."